September weather forecast and climate
Chattahoochee, FL

Weather in September

September, the first month of the autumn, in Chattahoochee, is still a tropical month, with average temperature varying between 87.3°F (30.7°C) and 69.6°F (20.9°C).

Temperature

In Chattahoochee, the average high-temperature in September is relatively the same as in August - a still tropical 87.3°F (30.7°C). In September, the average low-temperature is 69.6°F (20.9°C).

Heat index

The average heat index in September is appraised at a very hot 102°F (38.9°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, clothing, metabolic differences). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

Months with the highest humidity are August, September and December, with an average relative humidity of 77%.

Rainfall

In September, in Chattahoochee, the rain falls for 18.8 days. Throughout September, 3.15" (80mm) of precipitation is accumulated. Throughout the year, in Chattahoochee, there are 182.5 rainfall days, and 36.97" (939mm) of precipitation is accumulated.

Snowfall

In Chattahoochee, Florida, snow does not fall in February through December.

Daylight

In September, the average length of the day in Chattahoochee is 12.3h.

Sunshine

In Chattahoochee, Florida, the average sunshine is 8.6h.

UV index

In Chattahoochee, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Chattahoochee?

In September, in Chattahoochee, Florida, the average high-temperature is 87.3°F (30.7°C), and the average low-temperature is 69.6°F (20.9°C). In September, the average heat index (a.k.a. 'feels like', 'real feel'), that factores the actual air temperature with the relative humidity, is estimated at 102°F (38.9°C).

What is the most humid month in Chattahoochee?

August, September and December, with an average relative humidity of 77%, are most humid months.

What is the average humidity in September in Chattahoochee?

In Chattahoochee, the average relative humidity in September is 77%.

How many days does it rain in September in Chattahoochee?

In Chattahoochee, in September, during 18.8 rainfall days, 3.15" (80mm) of precipitation is typically accumulated.

When it does not snow in Chattahoochee?

February through December are months without snowfall.

How many hours of daylight does Chattahoochee have in September?

In Chattahoochee, Florida, the average length of the day in September is 12.3h.

How many hours of sunshine does Chattahoochee have in September?

In September, the average sunshine is 8.6h.

What is the UV index intensity in September in Chattahoochee?

In Chattahoochee, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV radiation.

Average temperature in September
Chattahoochee, FL

Average temperature in September - Chattahoochee, FL
  • Average high temperature in September: 87.3°F

The warmest months (with the highest average high temperature) are July and August (90.3°F).
The month with the lowest average high temperature is January (59.7°F).

  • Average low temperature in September: 69.6°F

The month with the highest average low temperature is August (74.3°F).
The coldest month (with the lowest average low temperature) is January (42.8°F).

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Average pressure in September
Chattahoochee, FL

Average pressure in September - Chattahoochee, FL
  • Average pressure in September: 29.98"

The month with the highest atmospheric pressure is January (30.16").
Months with the lowest atmospheric pressure are June, August and September (29.98").

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Average wind speed in September
Chattahoochee, FL

Average wind speed in September - Chattahoochee, FL
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is March (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in September
Chattahoochee, FL

Average humidity in September - Chattahoochee, FL
  • Average humidity in September: 77%

Months with the highest relative humidity are August, September and December (77%).
The month with the lowest relative humidity is May (71%).

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Average rainfall in September
Chattahoochee, FL

Average rainfall in September - Chattahoochee, FL
  • Average rainfall in September: 3.15"

The wettest month (with the highest rainfall) is August (5.28").
The driest month (with the least rainfall) is November (1.46").

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Average rainfall days in September
Chattahoochee, FL

Average rainfall days in September - Chattahoochee, FL
  • Average rainfall days in September: 18.8 days

The month with the highest number of rainy days is August (26.3 days).
The month with the least rainy days is November (8.3 days).

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Average snowfall in September
Chattahoochee, FL

Average snowfall in September - Chattahoochee, FL
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.04").
Months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in September
Chattahoochee, FL

Average snowfall days in September - Chattahoochee, FL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.2 days).
Months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in September /
Average sunshine in September
Chattahoochee, FL

Average daylight in September / Average sunshine in September - Chattahoochee, FL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.1h).
The month with the shortest days is December (Average daylight: 10.2h).

  • Average sunshine in September: 8.6h

Months with the most sunshine are June and July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 5.5h).

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Average sunshine days in September
Chattahoochee, FL

Average sunshine days in September - Chattahoochee, FL
  • Average sunshine days in September: 9.1 days

The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is July (3.4 days).

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Average UV index in September
Chattahoochee, FL

Average UV index in September - Chattahoochee, FL
  • Average UV index in September: 6

Months with the highest UV index are May, June, July and August (UV index 7).
Months with the lowest UV index are January and December (UV index 3).

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Average cloud cover in September
Chattahoochee, FL

Average cloud cover in September - Chattahoochee, FL
  • Average cloud cover in September: 30

The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 27).

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Average visibility in September
Chattahoochee, FL

Average visibility in September - Chattahoochee, FL
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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